Models of the atom (AQA GCSE Physics Combined Science): Quizzes
📚Quizzes
Practise the questions
11 questions from this quiz
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Practise the questions
11 questions from this quiz
Why did scientists change their ideas about atoms over time?
Why did scientists change their ideas about atoms over time?
New experiments gave fresh evidence
Who created the plum pudding model of the atom?
Who created the plum pudding model of the atom?
J.J. Thomson
In the plum pudding model, what did the atom contain?
In the plum pudding model, what did the atom contain?
Positive charge with electrons in it
How were charges distributed in Thomson's plum pudding model?
How were charges distributed in Thomson's plum pudding model?
Mixed together evenly
Who conducted the gold foil experiment?
Who conducted the gold foil experiment?
Ernest Rutherford
What did Rutherford fire at the gold foil in his experiment?
What did Rutherford fire at the gold foil in his experiment?
Alpha particles
What unexpected result occurred in the gold foil experiment?
What unexpected result occurred in the gold foil experiment?
A few alpha particles bounced back
What did Rutherford conclude atoms must have?
What did Rutherford conclude atoms must have?
A tiny, dense, positive nucleus
Who discovered neutrons in the nucleus?
Who discovered neutrons in the nucleus?
James Chadwick
What was Bohr's key improvement to the atomic model?
What was Bohr's key improvement to the atomic model?
Electrons orbit in specific energy levels
Why was Bohr's model accepted by scientists?
Why was Bohr's model accepted by scientists?
His calculations matched experiments